[Craig K.]

lowers the intake air temp. essentially you are pumpimg exhaustinto the engine, grantit the system goes to by-pass under full throttle, but if you road race were you are not always full throttle then it will be a little benificial, helps out on carb cars too, and makes the car small nice and rich.

I think on a normal DD car there is no benifit other than adding to the pollution problems